more precise is_relevant: requires original main goal, not initial goal state; tuned future_proof: minimal modification of goal state, retain original maxidx; tuned;
more precise is_relevant: requires original main goal, not initial goal state;
tuned future_proof: minimal modification of goal state, retain original maxidx;
tuned;

MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle